Every so often a drug comes along that has the potential to change the world. Medical specialists say the latest to offer that possibility are the new drugs that treat obesity — Ozempic, Wegovy, Mounjaro and more that may soon be coming onto the market. It’s early, but nothing like these drugs has existed before. “Game changers,” said Jonathan Engel, a historian of medicine and health care policy at Baruch College in New York. Sign up for The Morning newsletter from the New York Times Obesity af